Police issued an arrest warrant for the 20-year-old man for following vehicular homicide; driving under the influence of drugs; criminal possession of a forged instrument; prohibited use of a weapon; failing to stop for a traffic control signal at place required; failure to yield right of way to a pedestrian at steady walk signal; possession of alcohol by an underage person; unlawful possession of marijuana by an underage person; and unlawful possession of marijuana paraphernalia by an underage person.

The driver’s name has not been released. Investigators said they believe he would turn himself in by the end of the week.

Peyton Knowlton, 8, was hit by a truck while riding a bicycle alongside her stepfather on May 20 at 17th Avenue and Alpine Street.

The driver of the pickup truck stayed at the scene and cooperated with the investigation, police said. He was released while police investigated the cause of the accident.

A witness said the driver and the stepfather were visibly distraught after the accident.

Emergency crews performed CPR on the child, but she died after being taken to Longmont United Hospital. Friends of the family have set up a GoFundMe page to support Knowlton’s family.